Patent US3142471A successfully refreshed from Google Patents.
US3142471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swivel chair or like article of furniture
Assignee: Individual
•
Filing: 1961-09-21
•
Granted: 1964-07-28
•
Expires: 1981-09-21
Abstract
No abstract record available.
Inventors
- 👤 Bertram S Silver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:49
CPC Classifications
A; A47; A47C; A47C3/00; A47C3/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A SWIVEL CHAIR COMPRISING A VERTICAL SUPPORT COLUMN, A SEAT MEMBER MOUNTED ATOP SAID COLUMN AND ROTATABLE ABOUT THE LONGITUDINAL AXIS THEREOF, A CAM AFFIXED TO SAID COLUMN AND LYING IN A SUBSTANTIALLY HORIZONTAL PLANE AND HAVING A PAIR OF DIAMETRICALLY OPPOSITE DEPRESSED SECTIONS AND RAISED SECTIONS INTERMEDIATE SAID DEPRESSED SECTIONS, A BIASING LEVER PIVOTED TO SAID SEAT MEMBER FOR ROTATION IN A HORIZONTAL PLANE, A CAM FOLLOWER MOUNTED ON SAID LEVER AND ENGAGING SAID CAM, AND SPRING MEANS URGING SAID LEVER AND CAM FOLLOWER TOWARD SAID CAM.
Claim 2
Dependent Claim
88 words
A SWIVEL CHAIR COMPRISING A VERTICAL SUPPORT COLUMN, A SEAT MEMBER MOUNTED ATOP SAID COLUMN AND ROTATABLE ABOUT THE LONGITUDINAL AXIS THEREOF, A CAM AFFIXED TO SAID COLUMN AND LYING IN A SUBSTANTIALLY HORIZONTAL PLANE AND HAVING A PAIR OF DIAMETRICALLY OPPOSITE DEPRESSED SECTIONS AND RAISED SECTIONS INTERMEDIATE SAID DEPRESSED SECTIONS, A BIASING LEVER PIVOTED TO SAID SEAT MEMBER FOR ROTATION IN A HORIZONTAL PLANE, A CAM FOLLOWER MOUNTED ON SAID LEVER AND ENGAGING SAID CAM, AND SPRING MEANS URGING SAID LEVER AND CAM FOLLOWER TOWARD SAID CAM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-28 | 1968-01-27 | 1968-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-28 | 1972-01-27 | 1972-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-28 | 1976-01-27 | 1976-07-28 | $7700.00 | Window Closed / Lapsed |